Ācārāṅga Sūtra 0.7.6

A mendicant who is fitted out with one robe, and a bowl as second (article), will not think: I shall beg for a second robe. He should beg for such a robe only as is allowed to be begged for, and he should wear it in the same state as he receives it. This is, &c. (see lesson, § 1). But when the hot season has come, one should leave off the used-up clothes; one should be clad with one or no garment-aspiring to freedom from bonds. Knowing what the Revered One, &c. (see lesson, § 1). When the thought occurs to a mendicant: 'I am myself, alone; I have nobody belonging to me, nor do I belong to anybody,' then he should thoroughly know himself as standing alone-aspiring to freedom from bonds. Penance suits him. Knowing what the Revered One has declared, one should thoroughly and in all respects conform to it.

A male or female mendicant eating food &c. should not shift (the morsel) from the left jaw to the right jaw, nor from the right jaw to the left jaw, to get a fuller taste of it, not caring for the taste (of it)-aspiring to freedom from bonds. Penance suits him. Knowing what the Revered One has declared, one should thoroughly and in all respects conform to it.

If this thought occurs to a monk: 'I am sick and not able, at this time, to regularly mortify the flesh,' that monk should regularly reduce his food; regularly reducing his food, and diminishing his sins, 'he should take proper care of his body, being immovable like a beam; exerting himself he dissolves his body.'

Entering a village, or a scot-free town, or a town with an earth-wall, or a town with a small wall, or an isolated town, or a large town, or a sea-town, or a mine, or a hermitage, or the halting-places of processions, or caravans, or a capital 2-a monk should beg for straw; having begged for straw he should retire with it to a secluded spot. After having repeatedly examined and cleaned the ground, where there are no eggs, nor living beings, nor seeds, nor sprouts, nor dew, nor water, nor ants, nor mildew, nor waterdrops, nor mud, nor cobwebs― he should spread the straw on it. Then he should there and then effect (the religious death called) itvara.

This is the truth: speaking truth, free from passion, crossing (the samsâra), abating irresoluteness, knowing all truth and not being known, leaving this frail body, overcoming all sorts of pains and troubles through trust in this (religion), he accomplishes this fearful (religious death). Even thus he will in due time put an end to existence. This has been adopted by many who were free from delusion; it is good, wholesome, proper, beatifying, meritorious. Thus I say.